Ann Bayefsky, writing for Fox News, has some thoughts on this.
President Obama told Jewish leaders in July 2009 that he was deliberately adopting a policy of putting daylight between America and Israel.
President Obama made Israeli settlements the key stumbling block in the Palestinian-Israeli conflict. Starting in 2009 he chose to castigate Israel publicly, often, and in extreme terms at the General Assembly and the Security Council.
President Obama treated Israel’s Prime Minister to a series of insulting snubs during his visit to the White House in March 2010.
President Obama cut a deal with Islamic states at a May 2010 meeting of parties to the nuclear non-proliferation treaty…agreed to help convene a 2012 international conference intended to pivot attention towards disarming Israel….
President Obama suggested in May 2011 that Israel use the 1967 borders as a starting point for negotiations—knowing full well that Israel considers those borders to be indefensible, and that agreements require the border issue to be determined by the parties themselves.
President Obama created a “global counter-terrorism forum” in September 2011 and invited eleven Muslim states to join—on the grounds that they were “on the front lines in the struggle against terrorism.” At the insistence of Turkey, he then denied entry to Israel.
President Obama told French President Nicolas Sarkozy in November 2011—when he thought he was off-mike—that he regretted having to deal with Israel’s Prime Minister.
In August, Joint Chiefs Chairman General Dempsey said: “our clocks are ticking at different paces” and he wouldn’t be “complicit” in an Israeli effort to destroy Iran’s nuclear facilities.
In [Secretary of State Hillary Clinton's] words, the Iranian threat is “existential” only for Israel; only Israel is “right in the bull’s eye.” President Obama’s “pro-Israel” policy, therefore, is to wait past the point that the intended victim of the planned genocide believes is safe.
President Obama denied Prime Minister Netanyahu’s request to meet with him in September, despite the Iranian peril.
[O]n Monday night, at the final debate, Governor Romney answered the question he was asked about what poses the greatest threat to our national security with “a nuclear Iran,” while President Obama responded “terrorist networks.”